The safety stock level is not a factor in the Economic Order Quantity model. Thus, a change in the safety stock level will not affect the economic order quantity.
If the factors in the numerator (the cost of placing an order and the periodic demand) increase, it will cause the EOQ to increase and vice versa. If the factor in the denominator (the carrying cost per unit per period) increases, it will cause the EOQ to decrease, and vice versa. Ordering costs is in the numerator and thus an increase in ordering costs will result in an increase in the economic order quantity. That is because it will become more economical to place fewer orders that are each larger in order to save on ordering costs.
If the factors in the numerator (the cost of placing an order and the periodic demand) increase, it will cause the EOQ to increase and vice versa. If the factor in the denominator (the carrying cost per unit per period) increases, it will cause the EOQ to decrease, and vice versa. The carrying cost rate is in the denominator and thus an increase in the carrying cost rate will result in a decrease in the economic order quantity, not an increase.
The purchase price per unit is not a factor in the Economic Order Quantity model. Thus, a change in the purchase price per unit will not affect the economic order quantity.
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